Hot-water circulating system



H. HACKMAN.

HOT WATER CIRCULATING SYSTEM.

APPLICATION FILED APR. 19, 1920.

m: l I

Patented Jan. 24, 1922.

Inventor.

resident of the city of Toronto,

UNITED STATES PATENT OFFICE.

HARRY HACKMAN, OF TORONTO, ONTARIO, CANADA.

HOT-WATER CIRCULATING SYSTEM.

Application filed April 19, 1920. Serial No. 375,051.

To (ZZZ whom it may concem.

Be it known that I, HARRY HAGKMAN, a subject of the King of GreatBritain, and county of York, Province of Ontario, in the 'Dominion ofCanada, have invented certain new and useful Improvements in Hot-WaterCirculating Systems, described in the following the heat in such watersu l is wasted PP y specification and illustrated in the accom panyingdrawings, that form part of the same.

The principal objects of this invention are, to ensure a constant supplyof hot water at the taps which may be obtained imme diately upon openingthe tap and to obviate the loss of heat through allowing the hotwater inthe pipes to 0001.

A further object is to minimize the set tling of dirt, scale, etc.,within the pipes, and to provide a circulating system which can bereadily adapted to any hot water systern.

tinuous circulation through the pipes is maintained.

In the drawings, Figure 1 is a diagrammatic elevational Viewillustrating the application of my invention to the water heatingsystem. 1

Figure 2 is a plan sectional view of the furnace and hot water reservoirshowing the arrangement of the heater coil.

It is well known that the ordinary system of piping dwellings with thehot water reservoir in the basement has a very objectionable feature, inthat when hot water isrequired the cold water in the pipes has first tobe emptied out and though only a small quantity of hot water may berequired the whole length of pipe has to be filled and through lying inthe pipe and cooling. It is therefore desirable to -maintain a con stantcirculation of the Water through the supply pipes and I have devised thepresent system as being very simple and effective.

The arrangement is diagrammatically Specification of Letters Patent.

Patented Jan. 24, 1922.

illustrated in the drawings where l'represents the hot water reservoirhaving the usual cold water supply 2 and hot water pipe 3 which leadsfrom the top of the reservoir to the various taps through the house.

At the dead end of the system which is usually the bath-room the hotwater supply 3 connects with the faucet 4. I

A T connection 5 is arranged in the faucet connection and a returncirculation pipe 6 is connected to said T and extends downwardly andconnects with a T 7, the branch 8 of which connects with the bottom ofthe reservoir and the branch 9 connects with the lower end of the heatercoil 10 arranged in the furnace. The upper end 11 of the heater coil isconnected into the side of the reservoir.

This arrangement of pipe provides that the supply to the heater coil 10must be taken either from the bottom of the reservoir or from the returnpipe 6 and as the water in the return pipe 6 will always be warmer thanthe water from the bottom of the reservoir the natural flow will be fromthe pipe 6 through the coil to the reservoir and as the water in thereturn pipe will through radiation be cooler than the water in the pipe3, the natural circulation is established. the cooler water fallinguntil it is passed through the heater coil when it is again forced intocirculation.

This arrangement eliminates any necessity for a back flow valve as therecannot possibly be any back flow of cold water, and such a constructionwill maintain a constant supply of hot water at the faucet and theheating of the water will be accomplished quicker and with less lossthan when cold water is taken directly from the bottom of the boiler tothe heater coil.

What I claim as my invention is 1. In a hot water circulating system,the combination of the reservoir and a heater coil having its upper endconnected solely intermediate of the height of said reservoir, :1- hotwater pipe leading from the top of the reservoir, a. return circulationpipe leading from the dead end of the hot water pipe and connecteddirectly to the lower end of the heater coil and to the lower end of thereservoir in a closed circuit.

2. In a hot water circulating system, the right pipe With the lowerendof the heater 7 combination of the hot water reservoir, a coil, and areturn circulation pipe connecthot Water feed connected to the top ofthe ed tosaid T and connected with the upper 10 reservoir, a heater coilhaving its upper end end of the hot water feed pipe from the connectedto the side of the reservoir, a pipe reservoir. 7

leading upwardly from the bottom of the, p I

reservoir, a T connection connecting said up- HARRY HACKMAN.

